Sorry you seem to have misinterpreted my reply. I am flight crew at LGW and not cabin crew.
Hand solo, I may be wrong but I believe you also work for BA, so you should be able to confirm the events from within. As you say, it was bizarre and unusual, but that's what happened. There was no master caution approaching V1, and even if one occurred, you should know BA SOP's dictate not to stop on a master caution at that speed unless it is serious serious stuff.
Anyway that's the story, discard it if you wish, but try chatting to others within the company. You'll soon be able to verify it.
Mary